well heres the thing with the MAFT
You can only have one "profile"
You take the base knob, and adjust it to the correction for the injectors that you have.
Place the toggle switch with RPM on it, to the non RPM position. make a run take note of wideband and other datalogging functions. making sure everythign is good on the base run. Then you slowly use the dials to correct by adding or reducing fuel through out the curve. I dont have the table with me right now to tell you the icnrements, but i believe its 10% increments or possibly 5% at idle, mid, and wot i believe (i havent looked at the board in a while to know the exact terms)

once you have that dialed in, then yuo switch to RPM mode, which provides 2 or 3% correction to fine tune it.
its a great device that allows you to Vent, run a better flowing MAFS, and for the price its a good tool

but i still would reccomend an SAFC for fine tuning, but i htink the MAFT is worth it if not just for the base mapping and injector correction. not to mention not having to worry about larger intake piping for larger turbos, just get a bigger filter.